source/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2004
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern const struct generic_mapping file_generic_mapping;
  25 extern struct current_user current_user;
  26 extern userdom_struct current_user_info;
  27 extern bool global_client_failed_oplock_break;
  28
  29 struct deferred_open_record {
  30         bool delayed_for_oplocks;
  31         struct file_id id;
  32 };
  33
  34 /****************************************************************************
  35  fd support routines - attempt to do a dos_open.
  36 ****************************************************************************/
  37
  38 static NTSTATUS fd_open(struct connection_struct *conn,
  39                     const char *fname,
  40                     files_struct *fsp,
  41                     int flags,
  42                     mode_t mode)
  43 {
  44         NTSTATUS status = NT_STATUS_OK;
  45
  46 #ifdef O_NOFOLLOW
  47         /*
  48          * Never follow symlinks on a POSIX client. The
  49          * client should be doing this.
  50          */
  51
  52         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
  53                 flags |= O_NOFOLLOW;
  54         }
  55 #endif
  56
  57         fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
  58         if (fsp->fh->fd == -1) {
  59                 status = map_nt_error_from_unix(errno);
  60         }
  61
  62         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
  63                     fname, flags, (int)mode, fsp->fh->fd,
  64                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
  65
  66         return status;
  67 }
  68
  69 /****************************************************************************
  70  Close the file associated with a fsp.
  71 ****************************************************************************/
  72
  73 NTSTATUS fd_close(files_struct *fsp)
  74 {
  75         if (fsp->fh->fd == -1) {
  76                 return NT_STATUS_OK; /* What we used to call a stat open. */
  77         }
  78         if (fsp->fh->ref_count > 1) {
  79                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
  80         }
  81         return fd_close_posix(fsp);
  82 }
  83
  84 /****************************************************************************
  85  Change the ownership of a file to that of the parent directory.
  86  Do this by fd if possible.
  87 ****************************************************************************/
  88
  89 static void change_file_owner_to_parent(connection_struct *conn,
  90                                         const char *inherit_from_dir,
  91                                         files_struct *fsp)
  92 {
  93         SMB_STRUCT_STAT parent_st;
  94         int ret;
  95
  96         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
  97         if (ret == -1) {
  98                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
  99                          "directory %s. Error was %s\n",
 100                          inherit_from_dir, strerror(errno) ));
 101                 return;
 102         }
 103
 104         become_root();
 105         ret = SMB_VFS_FCHOWN(fsp, parent_st.st_uid, (gid_t)-1);
 106         unbecome_root();
 107         if (ret == -1) {
 108                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 109                          "file %s to parent directory uid %u. Error "
 110                          "was %s\n", fsp->fsp_name,
 111                          (unsigned int)parent_st.st_uid,
 112                          strerror(errno) ));
 113         }
 114
 115         DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 116                   "parent directory uid %u.\n", fsp->fsp_name,
 117                   (unsigned int)parent_st.st_uid ));
 118 }
 119
 120 static NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 121                                        const char *inherit_from_dir,
 122                                        const char *fname,
 123                                        SMB_STRUCT_STAT *psbuf)
 124 {
 125         char *saved_dir = NULL;
 126         SMB_STRUCT_STAT sbuf;
 127         SMB_STRUCT_STAT parent_st;
 128         TALLOC_CTX *ctx = talloc_tos();
 129         NTSTATUS status = NT_STATUS_OK;
 130         int ret;
 131
 132         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
 133         if (ret == -1) {
 134                 status = map_nt_error_from_unix(errno);
 135                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 136                          "directory %s. Error was %s\n",
 137                          inherit_from_dir, strerror(errno) ));
 138                 return status;
 139         }
 140
 141         /* We've already done an lstat into psbuf, and we know it's a
 142            directory. If we can cd into the directory and the dev/ino
 143            are the same then we can safely chown without races as
 144            we're locking the directory in place by being in it.  This
 145            should work on any UNIX (thanks tridge :-). JRA.
 146         */
 147
 148         saved_dir = vfs_GetWd(ctx,conn);
 149         if (!saved_dir) {
 150                 status = map_nt_error_from_unix(errno);
 151                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 152                          "current working directory. Error was %s\n",
 153                          strerror(errno)));
 154                 return status;
 155         }
 156
 157         /* Chdir into the new path. */
 158         if (vfs_ChDir(conn, fname) == -1) {
 159                 status = map_nt_error_from_unix(errno);
 160                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 161                          "current working directory to %s. Error "
 162                          "was %s\n", fname, strerror(errno) ));
 163                 goto out;
 164         }
 165
 166         if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
 167                 status = map_nt_error_from_unix(errno);
 168                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 169                          "directory '.' (%s) Error was %s\n",
 170                          fname, strerror(errno)));
 171                 goto out;
 172         }
 173
 174         /* Ensure we're pointing at the same place. */
 175         if (sbuf.st_dev != psbuf->st_dev ||
 176             sbuf.st_ino != psbuf->st_ino ||
 177             sbuf.st_mode != psbuf->st_mode ) {
 178                 DEBUG(0,("change_dir_owner_to_parent: "
 179                          "device/inode/mode on directory %s changed. "
 180                          "Refusing to chown !\n", fname ));
 181                 status = NT_STATUS_ACCESS_DENIED;
 182                 goto out;
 183         }
 184
 185         become_root();
 186         ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
 187         unbecome_root();
 188         if (ret == -1) {
 189                 status = map_nt_error_from_unix(errno);
 190                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 191                           "directory %s to parent directory uid %u. "
 192                           "Error was %s\n", fname,
 193                           (unsigned int)parent_st.st_uid, strerror(errno) ));
 194                 goto out;
 195         }
 196
 197         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 198                   "directory %s to parent directory uid %u.\n",
 199                   fname, (unsigned int)parent_st.st_uid ));
 200
 201  out:
 202
 203         vfs_ChDir(conn,saved_dir);
 204         return status;
 205 }
 206
 207 /****************************************************************************
 208  Open a file.
 209 ****************************************************************************/
 210
 211 static NTSTATUS open_file(files_struct *fsp,
 212                           connection_struct *conn,
 213                           struct smb_request *req,
 214                           const char *parent_dir,
 215                           const char *name,
 216                           const char *path,
 217                           SMB_STRUCT_STAT *psbuf,
 218                           int flags,
 219                           mode_t unx_mode,
 220                           uint32 access_mask, /* client requested access mask. */
 221                           uint32 open_access_mask) /* what we're actually using in the open. */
 222 {
 223         NTSTATUS status = NT_STATUS_OK;
 224         int accmode = (flags & O_ACCMODE);
 225         int local_flags = flags;
 226         bool file_existed = VALID_STAT(*psbuf);
 227
 228         fsp->fh->fd = -1;
 229         errno = EPERM;
 230
 231         /* Check permissions */
 232
 233         /*
 234          * This code was changed after seeing a client open request
 235          * containing the open mode of (DENY_WRITE/read-only) with
 236          * the 'create if not exist' bit set. The previous code
 237          * would fail to open the file read only on a read-only share
 238          * as it was checking the flags parameter  directly against O_RDONLY,
 239          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 240          * JRA.
 241          */
 242
 243         if (!CAN_WRITE(conn)) {
 244                 /* It's a read-only share - fail if we wanted to write. */
 245                 if(accmode != O_RDONLY) {
 246                         DEBUG(3,("Permission denied opening %s\n", path));
 247                         return NT_STATUS_ACCESS_DENIED;
 248                 } else if(flags & O_CREAT) {
 249                         /* We don't want to write - but we must make sure that
 250                            O_CREAT doesn't create the file if we have write
 251                            access into the directory.
 252                         */
 253                         flags &= ~O_CREAT;
 254                         local_flags &= ~O_CREAT;
 255                 }
 256         }
 257
 258         /*
 259          * This little piece of insanity is inspired by the
 260          * fact that an NT client can open a file for O_RDONLY,
 261          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 262          * If the client *can* write to the file, then it expects to
 263          * truncate the file, even though it is opening for readonly.
 264          * Quicken uses this stupid trick in backup file creation...
 265          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 266          * for helping track this one down. It didn't bite us in 2.0.x
 267          * as we always opened files read-write in that release. JRA.
 268          */
 269
 270         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 271                 DEBUG(10,("open_file: truncate requested on read-only open "
 272                           "for file %s\n", path));
 273                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 274         }
 275
 276         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 277             (!file_existed && (local_flags & O_CREAT)) ||
 278             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 279
 280                 /*
 281                  * We can't actually truncate here as the file may be locked.
 282                  * open_file_ntcreate will take care of the truncate later. JRA.
 283                  */
 284
 285                 local_flags &= ~O_TRUNC;
 286
 287 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 288                 /*
 289                  * We would block on opening a FIFO with no one else on the
 290                  * other end. Do what we used to do and add O_NONBLOCK to the
 291                  * open flags. JRA.
 292                  */
 293
 294                 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
 295                         local_flags |= O_NONBLOCK;
 296                 }
 297 #endif
 298
 299                 /* Don't create files with Microsoft wildcard characters. */
 300                 if ((local_flags & O_CREAT) && !file_existed &&
 301                     ms_has_wild(path))  {
 302                         return NT_STATUS_OBJECT_NAME_INVALID;
 303                 }
 304
 305                 /* Actually do the open */
 306                 status = fd_open(conn, path, fsp, local_flags, unx_mode);
 307                 if (!NT_STATUS_IS_OK(status)) {
 308                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 309                                  "(flags=%d)\n",
 310                                  path,nt_errstr(status),local_flags,flags));
 311                         return status;
 312                 }
 313
 314                 if ((local_flags & O_CREAT) && !file_existed) {
 315
 316                         /* Inherit the ACL if required */
 317                         if (lp_inherit_perms(SNUM(conn))) {
 318                                 inherit_access_acl(conn, parent_dir, path,
 319                                                    unx_mode);
 320                         }
 321
 322                         /* Change the owner if required. */
 323                         if (lp_inherit_owner(SNUM(conn))) {
 324                                 change_file_owner_to_parent(conn, parent_dir,
 325                                                             fsp);
 326                         }
 327
 328                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 329                                      FILE_NOTIFY_CHANGE_FILE_NAME, path);
 330                 }
 331
 332         } else {
 333                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 334         }
 335
 336         if (!file_existed) {
 337                 int ret;
 338
 339                 if (fsp->fh->fd == -1) {
 340                         ret = SMB_VFS_STAT(conn, path, psbuf);
 341                 } else {
 342                         ret = SMB_VFS_FSTAT(fsp, psbuf);
 343                         /* If we have an fd, this stat should succeed. */
 344                         if (ret == -1) {
 345                                 DEBUG(0,("Error doing fstat on open file %s "
 346                                          "(%s)\n", path,strerror(errno) ));
 347                         }
 348                 }
 349
 350                 /* For a non-io open, this stat failing means file not found. JRA */
 351                 if (ret == -1) {
 352                         status = map_nt_error_from_unix(errno);
 353                         fd_close(fsp);
 354                         return status;
 355                 }
 356         }
 357
 358         /*
 359          * POSIX allows read-only opens of directories. We don't
 360          * want to do this (we use a different code path for this)
 361          * so catch a directory open and return an EISDIR. JRA.
 362          */
 363
 364         if(S_ISDIR(psbuf->st_mode)) {
 365                 fd_close(fsp);
 366                 errno = EISDIR;
 367                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 368         }
 369
 370         fsp->mode = psbuf->st_mode;
 371         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
 372         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 373         fsp->file_pid = req ? req->smbpid : 0;
 374         fsp->can_lock = True;
 375         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 376         if (!CAN_WRITE(conn)) {
 377                 fsp->can_write = False;
 378         } else {
 379                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 380                         True : False;
 381         }
 382         fsp->print_file = False;
 383         fsp->modified = False;
 384         fsp->sent_oplock_break = NO_BREAK_SENT;
 385         fsp->is_directory = False;
 386         fsp->is_stat = False;
 387         if (conn->aio_write_behind_list &&
 388             is_in_path(path, conn->aio_write_behind_list, conn->case_sensitive)) {
 389                 fsp->aio_write_behind = True;
 390         }
 391
 392         string_set(&fsp->fsp_name, path);
 393         fsp->wcp = NULL; /* Write cache pointer. */
 394
 395         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 396                  *current_user_info.smb_name ?
 397                  current_user_info.smb_name : conn->user,fsp->fsp_name,
 398                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 399                  conn->num_files_open + 1));
 400
 401         errno = 0;
 402         return NT_STATUS_OK;
 403 }
 404
 405 /*******************************************************************
 406  Return True if the filename is one of the special executable types.
 407 ********************************************************************/
 408
 409 static bool is_executable(const char *fname)
 410 {
 411         if ((fname = strrchr_m(fname,'.'))) {
 412                 if (strequal(fname,".com") ||
 413                     strequal(fname,".dll") ||
 414                     strequal(fname,".exe") ||
 415                     strequal(fname,".sym")) {
 416                         return True;
 417                 }
 418         }
 419         return False;
 420 }
 421
 422 /****************************************************************************
 423  Check if we can open a file with a share mode.
 424  Returns True if conflict, False if not.
 425 ****************************************************************************/
 426
 427 static bool share_conflict(struct share_mode_entry *entry,
 428                            uint32 access_mask,
 429                            uint32 share_access)
 430 {
 431         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 432                   "entry->share_access = 0x%x, "
 433                   "entry->private_options = 0x%x\n",
 434                   (unsigned int)entry->access_mask,
 435                   (unsigned int)entry->share_access,
 436                   (unsigned int)entry->private_options));
 437
 438         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 439                   (unsigned int)access_mask, (unsigned int)share_access));
 440
 441         if ((entry->access_mask & (FILE_WRITE_DATA|
 442                                    FILE_APPEND_DATA|
 443                                    FILE_READ_DATA|
 444                                    FILE_EXECUTE|
 445                                    DELETE_ACCESS)) == 0) {
 446                 DEBUG(10,("share_conflict: No conflict due to "
 447                           "entry->access_mask = 0x%x\n",
 448                           (unsigned int)entry->access_mask ));
 449                 return False;
 450         }
 451
 452         if ((access_mask & (FILE_WRITE_DATA|
 453                             FILE_APPEND_DATA|
 454                             FILE_READ_DATA|
 455                             FILE_EXECUTE|
 456                             DELETE_ACCESS)) == 0) {
 457                 DEBUG(10,("share_conflict: No conflict due to "
 458                           "access_mask = 0x%x\n",
 459                           (unsigned int)access_mask ));
 460                 return False;
 461         }
 462
 463 #if 1 /* JRA TEST - Superdebug. */
 464 #define CHECK_MASK(num, am, right, sa, share) \
 465         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 466                 (unsigned int)(num), (unsigned int)(am), \
 467                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 468         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 469                 (unsigned int)(num), (unsigned int)(sa), \
 470                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 471         if (((am) & (right)) && !((sa) & (share))) { \
 472                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 473 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 474                         (unsigned int)(share) )); \
 475                 return True; \
 476         }
 477 #else
 478 #define CHECK_MASK(num, am, right, sa, share) \
 479         if (((am) & (right)) && !((sa) & (share))) { \
 480                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 481 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 482                         (unsigned int)(share) )); \
 483                 return True; \
 484         }
 485 #endif
 486
 487         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 488                    share_access, FILE_SHARE_WRITE);
 489         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 490                    entry->share_access, FILE_SHARE_WRITE);
 491
 492         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 493                    share_access, FILE_SHARE_READ);
 494         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 495                    entry->share_access, FILE_SHARE_READ);
 496
 497         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 498                    share_access, FILE_SHARE_DELETE);
 499         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 500                    entry->share_access, FILE_SHARE_DELETE);
 501
 502         DEBUG(10,("share_conflict: No conflict.\n"));
 503         return False;
 504 }
 505
 506 #if defined(DEVELOPER)
 507 static void validate_my_share_entries(int num,
 508                                       struct share_mode_entry *share_entry)
 509 {
 510         files_struct *fsp;
 511
 512         if (!procid_is_me(&share_entry->pid)) {
 513                 return;
 514         }
 515
 516         if (is_deferred_open_entry(share_entry) &&
 517             !open_was_deferred(share_entry->op_mid)) {
 518                 char *str = talloc_asprintf(talloc_tos(),
 519                         "Got a deferred entry without a request: "
 520                         "PANIC: %s\n",
 521                         share_mode_str(talloc_tos(), num, share_entry));
 522                 smb_panic(str);
 523         }
 524
 525         if (!is_valid_share_mode_entry(share_entry)) {
 526                 return;
 527         }
 528
 529         fsp = file_find_dif(share_entry->id,
 530                             share_entry->share_file_id);
 531         if (!fsp) {
 532                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 533                          share_mode_str(talloc_tos(), num, share_entry) ));
 534                 smb_panic("validate_my_share_entries: Cannot match a "
 535                           "share entry with an open file\n");
 536         }
 537
 538         if (is_deferred_open_entry(share_entry) ||
 539             is_unused_share_mode_entry(share_entry)) {
 540                 goto panic;
 541         }
 542
 543         if ((share_entry->op_type == NO_OPLOCK) &&
 544             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 545                 /* Someone has already written to it, but I haven't yet
 546                  * noticed */
 547                 return;
 548         }
 549
 550         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 551                 goto panic;
 552         }
 553
 554         return;
 555
 556  panic:
 557         {
 558                 char *str;
 559                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 560                          share_mode_str(talloc_tos(), num, share_entry) ));
 561                 str = talloc_asprintf(talloc_tos(),
 562                         "validate_my_share_entries: "
 563                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 564                          fsp->fsp_name, (unsigned int)fsp->oplock_type,
 565                          (unsigned int)share_entry->op_type );
 566                 smb_panic(str);
 567         }
 568 }
 569 #endif
 570
 571 static bool is_stat_open(uint32 access_mask)
 572 {
 573         return (access_mask &&
 574                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 575                                   FILE_WRITE_ATTRIBUTES))==0) &&
 576                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 577                                  FILE_WRITE_ATTRIBUTES)) != 0));
 578 }
 579
 580 /****************************************************************************
 581  Deal with share modes
 582  Invarient: Share mode must be locked on entry and exit.
 583  Returns -1 on error, or number of share modes on success (may be zero).
 584 ****************************************************************************/
 585
 586 static NTSTATUS open_mode_check(connection_struct *conn,
 587                                 const char *fname,
 588                                 struct share_mode_lock *lck,
 589                                 uint32 access_mask,
 590                                 uint32 share_access,
 591                                 uint32 create_options,
 592                                 bool *file_existed)
 593 {
 594         int i;
 595
 596         if(lck->num_share_modes == 0) {
 597                 return NT_STATUS_OK;
 598         }
 599
 600         *file_existed = True;
 601
 602         if (is_stat_open(access_mask)) {
 603                 /* Stat open that doesn't trigger oplock breaks or share mode
 604                  * checks... ! JRA. */
 605                 return NT_STATUS_OK;
 606         }
 607
 608         /* A delete on close prohibits everything */
 609
 610         if (lck->delete_on_close) {
 611                 return NT_STATUS_DELETE_PENDING;
 612         }
 613
 614         /*
 615          * Check if the share modes will give us access.
 616          */
 617
 618 #if defined(DEVELOPER)
 619         for(i = 0; i < lck->num_share_modes; i++) {
 620                 validate_my_share_entries(i, &lck->share_modes[i]);
 621         }
 622 #endif
 623
 624         if (!lp_share_modes(SNUM(conn))) {
 625                 return NT_STATUS_OK;
 626         }
 627
 628         /* Now we check the share modes, after any oplock breaks. */
 629         for(i = 0; i < lck->num_share_modes; i++) {
 630
 631                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 632                         continue;
 633                 }
 634
 635                 /* someone else has a share lock on it, check to see if we can
 636                  * too */
 637                 if (share_conflict(&lck->share_modes[i],
 638                                    access_mask, share_access)) {
 639                         return NT_STATUS_SHARING_VIOLATION;
 640                 }
 641         }
 642
 643         return NT_STATUS_OK;
 644 }
 645
 646 static bool is_delete_request(files_struct *fsp) {
 647         return ((fsp->access_mask == DELETE_ACCESS) &&
 648                 (fsp->oplock_type == NO_OPLOCK));
 649 }
 650
 651 /*
 652  * 1) No files open at all or internal open: Grant whatever the client wants.
 653  *
 654  * 2) Exclusive (or batch) oplock around: If the requested access is a delete
 655  *    request, break if the oplock around is a batch oplock. If it's another
 656  *    requested access type, break.
 657  *
 658  * 3) Only level2 around: Grant level2 and do nothing else.
 659  */
 660
 661 static bool delay_for_oplocks(struct share_mode_lock *lck,
 662                               files_struct *fsp,
 663                               uint16 mid,
 664                               int pass_number,
 665                               int oplock_request)
 666 {
 667         int i;
 668         struct share_mode_entry *exclusive = NULL;
 669         bool valid_entry = False;
 670         bool delay_it = False;
 671         bool have_level2 = False;
 672         NTSTATUS status;
 673         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 674
 675         if (oplock_request & INTERNAL_OPEN_ONLY) {
 676                 fsp->oplock_type = NO_OPLOCK;
 677         }
 678
 679         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
 680                 return False;
 681         }
 682
 683         for (i=0; i<lck->num_share_modes; i++) {
 684
 685                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 686                         continue;
 687                 }
 688
 689                 /* At least one entry is not an invalid or deferred entry. */
 690                 valid_entry = True;
 691
 692                 if (pass_number == 1) {
 693                         if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 694                                 SMB_ASSERT(exclusive == NULL);
 695                                 exclusive = &lck->share_modes[i];
 696                         }
 697                 } else {
 698                         if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 699                                 SMB_ASSERT(exclusive == NULL);
 700                                 exclusive = &lck->share_modes[i];
 701                         }
 702                 }
 703
 704                 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
 705                         SMB_ASSERT(exclusive == NULL);
 706                         have_level2 = True;
 707                 }
 708         }
 709
 710         if (!valid_entry) {
 711                 /* All entries are placeholders or deferred.
 712                  * Directly grant whatever the client wants. */
 713                 if (fsp->oplock_type == NO_OPLOCK) {
 714                         /* Store a level2 oplock, but don't tell the client */
 715                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 716                 }
 717                 return False;
 718         }
 719
 720         if (exclusive != NULL) { /* Found an exclusive oplock */
 721                 SMB_ASSERT(!have_level2);
 722                 delay_it = is_delete_request(fsp) ?
 723                         BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
 724         }
 725
 726         if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
 727                 /* We can at most grant level2 as there are other
 728                  * level2 or NO_OPLOCK entries. */
 729                 fsp->oplock_type = LEVEL_II_OPLOCK;
 730         }
 731
 732         if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
 733                 /* Store a level2 oplock, but don't tell the client */
 734                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 735         }
 736
 737         if (!delay_it) {
 738                 return False;
 739         }
 740
 741         /*
 742          * Send a break message to the oplock holder and delay the open for
 743          * our client.
 744          */
 745
 746         DEBUG(10, ("Sending break request to PID %s\n",
 747                    procid_str_static(&exclusive->pid)));
 748         exclusive->op_mid = mid;
 749
 750         /* Create the message. */
 751         share_mode_entry_to_message(msg, exclusive);
 752
 753         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 754            don't want this set in the share mode struct pointed to by lck. */
 755
 756         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 757                 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 758         }
 759
 760         status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
 761                                     MSG_SMB_BREAK_REQUEST,
 762                                     (uint8 *)msg,
 763                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 764         if (!NT_STATUS_IS_OK(status)) {
 765                 DEBUG(3, ("Could not send oplock break message: %s\n",
 766                           nt_errstr(status)));
 767         }
 768
 769         return True;
 770 }
 771
 772 static bool request_timed_out(struct timeval request_time,
 773                               struct timeval timeout)
 774 {
 775         struct timeval now, end_time;
 776         GetTimeOfDay(&now);
 777         end_time = timeval_sum(&request_time, &timeout);
 778         return (timeval_compare(&end_time, &now) < 0);
 779 }
 780
 781 /****************************************************************************
 782  Handle the 1 second delay in returning a SHARING_VIOLATION error.
 783 ****************************************************************************/
 784
 785 static void defer_open(struct share_mode_lock *lck,
 786                        struct timeval request_time,
 787                        struct timeval timeout,
 788                        struct smb_request *req,
 789                        struct deferred_open_record *state)
 790 {
 791         int i;
 792
 793         /* Paranoia check */
 794
 795         for (i=0; i<lck->num_share_modes; i++) {
 796                 struct share_mode_entry *e = &lck->share_modes[i];
 797
 798                 if (!is_deferred_open_entry(e)) {
 799                         continue;
 800                 }
 801
 802                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
 803                         DEBUG(0, ("Trying to defer an already deferred "
 804                                   "request: mid=%d, exiting\n", req->mid));
 805                         exit_server("attempt to defer a deferred request");
 806                 }
 807         }
 808
 809         /* End paranoia check */
 810
 811         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
 812                   "open entry for mid %u\n",
 813                   (unsigned int)request_time.tv_sec,
 814                   (unsigned int)request_time.tv_usec,
 815                   (unsigned int)req->mid));
 816
 817         if (!push_deferred_smb_message(req, request_time, timeout,
 818                                        (char *)state, sizeof(*state))) {
 819                 exit_server("push_deferred_smb_message failed");
 820         }
 821         add_deferred_open(lck, req->mid, request_time, state->id);
 822
 823         /*
 824          * Push the MID of this packet on the signing queue.
 825          * We only do this once, the first time we push the packet
 826          * onto the deferred open queue, as this has a side effect
 827          * of incrementing the response sequence number.
 828          */
 829
 830         srv_defer_sign_response(req->mid);
 831 }
 832
 833
 834 /****************************************************************************
 835  On overwrite open ensure that the attributes match.
 836 ****************************************************************************/
 837
 838 static bool open_match_attributes(connection_struct *conn,
 839                                   const char *path,
 840                                   uint32 old_dos_attr,
 841                                   uint32 new_dos_attr,
 842                                   mode_t existing_unx_mode,
 843                                   mode_t new_unx_mode,
 844                                   mode_t *returned_unx_mode)
 845 {
 846         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
 847
 848         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 849         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 850
 851         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
 852            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
 853                 *returned_unx_mode = new_unx_mode;
 854         } else {
 855                 *returned_unx_mode = (mode_t)0;
 856         }
 857
 858         DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
 859                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
 860                   "returned_unx_mode = 0%o\n",
 861                   path,
 862                   (unsigned int)old_dos_attr,
 863                   (unsigned int)existing_unx_mode,
 864                   (unsigned int)new_dos_attr,
 865                   (unsigned int)*returned_unx_mode ));
 866
 867         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
 868         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 869                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
 870                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
 871                         return False;
 872                 }
 873         }
 874         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 875                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
 876                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
 877                         return False;
 878                 }
 879         }
 880         return True;
 881 }
 882
 883 /****************************************************************************
 884  Special FCB or DOS processing in the case of a sharing violation.
 885  Try and find a duplicated file handle.
 886 ****************************************************************************/
 887
 888 static files_struct *fcb_or_dos_open(connection_struct *conn,
 889                                      const char *fname,
 890                                      struct file_id id,
 891                                      uint16 file_pid,
 892                                      uint16 vuid,
 893                                      uint32 access_mask,
 894                                      uint32 share_access,
 895                                      uint32 create_options)
 896 {
 897         files_struct *fsp;
 898         files_struct *dup_fsp;
 899
 900         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
 901                  "file %s.\n", fname ));
 902
 903         for(fsp = file_find_di_first(id); fsp;
 904             fsp = file_find_di_next(fsp)) {
 905
 906                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
 907                           "vuid = %u, file_pid = %u, private_options = 0x%x "
 908                           "access_mask = 0x%x\n", fsp->fsp_name,
 909                           fsp->fh->fd, (unsigned int)fsp->vuid,
 910                           (unsigned int)fsp->file_pid,
 911                           (unsigned int)fsp->fh->private_options,
 912                           (unsigned int)fsp->access_mask ));
 913
 914                 if (fsp->fh->fd != -1 &&
 915                     fsp->vuid == vuid &&
 916                     fsp->file_pid == file_pid &&
 917                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
 918                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
 919                     (fsp->access_mask & FILE_WRITE_DATA) &&
 920                     strequal(fsp->fsp_name, fname)) {
 921                         DEBUG(10,("fcb_or_dos_open: file match\n"));
 922                         break;
 923                 }
 924         }
 925
 926         if (!fsp) {
 927                 return NULL;
 928         }
 929
 930         /* quite an insane set of semantics ... */
 931         if (is_executable(fname) &&
 932             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
 933                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
 934                 return NULL;
 935         }
 936
 937         /* We need to duplicate this fsp. */
 938         if (!NT_STATUS_IS_OK(dup_file_fsp(fsp, access_mask, share_access,
 939                                           create_options, &dup_fsp))) {
 940                 return NULL;
 941         }
 942
 943         return dup_fsp;
 944 }
 945
 946 /****************************************************************************
 947  Open a file with a share mode - old openX method - map into NTCreate.
 948 ****************************************************************************/
 949
 950 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
 951                                  uint32 *paccess_mask,
 952                                  uint32 *pshare_mode,
 953                                  uint32 *pcreate_disposition,
 954                                  uint32 *pcreate_options)
 955 {
 956         uint32 access_mask;
 957         uint32 share_mode;
 958         uint32 create_disposition;
 959         uint32 create_options = 0;
 960
 961         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
 962                   "open_func = 0x%x\n",
 963                   fname, (unsigned int)deny_mode, (unsigned int)open_func ));
 964
 965         /* Create the NT compatible access_mask. */
 966         switch (GET_OPENX_MODE(deny_mode)) {
 967                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
 968                 case DOS_OPEN_RDONLY:
 969                         access_mask = FILE_GENERIC_READ;
 970                         break;
 971                 case DOS_OPEN_WRONLY:
 972                         access_mask = FILE_GENERIC_WRITE;
 973                         break;
 974                 case DOS_OPEN_RDWR:
 975                 case DOS_OPEN_FCB:
 976                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
 977                         break;
 978                 default:
 979                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
 980                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
 981                         return False;
 982         }
 983
 984         /* Create the NT compatible create_disposition. */
 985         switch (open_func) {
 986                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
 987                         create_disposition = FILE_CREATE;
 988                         break;
 989
 990                 case OPENX_FILE_EXISTS_OPEN:
 991                         create_disposition = FILE_OPEN;
 992                         break;
 993
 994                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
 995                         create_disposition = FILE_OPEN_IF;
 996                         break;
 997
 998                 case OPENX_FILE_EXISTS_TRUNCATE:
 999                         create_disposition = FILE_OVERWRITE;
1000                         break;
1001
1002                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1003                         create_disposition = FILE_OVERWRITE_IF;
1004                         break;
1005
1006                 default:
1007                         /* From samba4 - to be confirmed. */
1008                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1009                                 create_disposition = FILE_CREATE;
1010                                 break;
1011                         }
1012                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1013                                   "open_func 0x%x\n", (unsigned int)open_func));
1014                         return False;
1015         }
1016
1017         /* Create the NT compatible share modes. */
1018         switch (GET_DENY_MODE(deny_mode)) {
1019                 case DENY_ALL:
1020                         share_mode = FILE_SHARE_NONE;
1021                         break;
1022
1023                 case DENY_WRITE:
1024                         share_mode = FILE_SHARE_READ;
1025                         break;
1026
1027                 case DENY_READ:
1028                         share_mode = FILE_SHARE_WRITE;
1029                         break;
1030
1031                 case DENY_NONE:
1032                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1033                         break;
1034
1035                 case DENY_DOS:
1036                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1037                         if (is_executable(fname)) {
1038                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1039                         } else {
1040                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1041                                         share_mode = FILE_SHARE_READ;
1042                                 } else {
1043                                         share_mode = FILE_SHARE_NONE;
1044                                 }
1045                         }
1046                         break;
1047
1048                 case DENY_FCB:
1049                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1050                         share_mode = FILE_SHARE_NONE;
1051                         break;
1052
1053                 default:
1054                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1055                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1056                         return False;
1057         }
1058
1059         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1060                   "share_mode = 0x%x, create_disposition = 0x%x, "
1061                   "create_options = 0x%x\n",
1062                   fname,
1063                   (unsigned int)access_mask,
1064                   (unsigned int)share_mode,
1065                   (unsigned int)create_disposition,
1066                   (unsigned int)create_options ));
1067
1068         if (paccess_mask) {
1069                 *paccess_mask = access_mask;
1070         }
1071         if (pshare_mode) {
1072                 *pshare_mode = share_mode;
1073         }
1074         if (pcreate_disposition) {
1075                 *pcreate_disposition = create_disposition;
1076         }
1077         if (pcreate_options) {
1078                 *pcreate_options = create_options;
1079         }
1080
1081         return True;
1082
1083 }
1084
1085 static void schedule_defer_open(struct share_mode_lock *lck,
1086                                 struct timeval request_time,
1087                                 struct smb_request *req)
1088 {
1089         struct deferred_open_record state;
1090
1091         /* This is a relative time, added to the absolute
1092            request_time value to get the absolute timeout time.
1093            Note that if this is the second or greater time we enter
1094            this codepath for this particular request mid then
1095            request_time is left as the absolute time of the *first*
1096            time this request mid was processed. This is what allows
1097            the request to eventually time out. */
1098
1099         struct timeval timeout;
1100
1101         /* Normally the smbd we asked should respond within
1102          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1103          * the client did, give twice the timeout as a safety
1104          * measure here in case the other smbd is stuck
1105          * somewhere else. */
1106
1107         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1108
1109         /* Nothing actually uses state.delayed_for_oplocks
1110            but it's handy to differentiate in debug messages
1111            between a 30 second delay due to oplock break, and
1112            a 1 second delay for share mode conflicts. */
1113
1114         state.delayed_for_oplocks = True;
1115         state.id = lck->id;
1116
1117         if (!request_timed_out(request_time, timeout)) {
1118                 defer_open(lck, request_time, timeout, req, &state);
1119         }
1120 }
1121
1122 /****************************************************************************
1123  Open a file with a share mode.
1124 ****************************************************************************/
1125
1126 NTSTATUS open_file_ntcreate(connection_struct *conn,
1127                             struct smb_request *req,
1128                             const char *fname,
1129                             SMB_STRUCT_STAT *psbuf,
1130                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1131                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1132                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1133                             uint32 create_options,      /* options such as delete on close. */
1134                             uint32 new_dos_attributes,  /* attributes used for new file. */
1135                             int oplock_request,         /* internal Samba oplock codes. */
1136                                                         /* Information (FILE_EXISTS etc.) */
1137                             int *pinfo,
1138                             files_struct **result)
1139 {
1140         int flags=0;
1141         int flags2=0;
1142         bool file_existed = VALID_STAT(*psbuf);
1143         bool def_acl = False;
1144         bool posix_open = False;
1145         bool new_file_created = False;
1146         struct file_id id;
1147         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1148         files_struct *fsp = NULL;
1149         mode_t new_unx_mode = (mode_t)0;
1150         mode_t unx_mode = (mode_t)0;
1151         int info;
1152         uint32 existing_dos_attributes = 0;
1153         struct pending_message_list *pml = NULL;
1154         struct timeval request_time = timeval_zero();
1155         struct share_mode_lock *lck = NULL;
1156         uint32 open_access_mask = access_mask;
1157         NTSTATUS status;
1158         int ret_flock;
1159         char *parent_dir;
1160         const char *newname;
1161
1162         ZERO_STRUCT(id);
1163
1164         if (conn->printer) {
1165                 /*
1166                  * Printers are handled completely differently.
1167                  * Most of the passed parameters are ignored.
1168                  */
1169
1170                 if (pinfo) {
1171                         *pinfo = FILE_WAS_CREATED;
1172                 }
1173
1174                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1175
1176                 return print_fsp_open(conn, fname, result);
1177         }
1178
1179         if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1180                                    &newname)) {
1181                 return NT_STATUS_NO_MEMORY;
1182         }
1183
1184         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1185                 posix_open = True;
1186                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1187                 new_dos_attributes = 0;
1188         } else {
1189                 /* We add aARCH to this as this mode is only used if the file is
1190                  * created new. */
1191                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1192                                      parent_dir);
1193         }
1194
1195         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1196                    "access_mask=0x%x share_access=0x%x "
1197                    "create_disposition = 0x%x create_options=0x%x "
1198                    "unix mode=0%o oplock_request=%d\n",
1199                    fname, new_dos_attributes, access_mask, share_access,
1200                    create_disposition, create_options, unx_mode,
1201                    oplock_request));
1202
1203         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1204                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1205                 return NT_STATUS_INTERNAL_ERROR;
1206         }
1207
1208         /*
1209          * Only non-internal opens can be deferred at all
1210          */
1211
1212         if ((req != NULL)
1213             && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1214                 struct deferred_open_record *state =
1215                         (struct deferred_open_record *)pml->private_data.data;
1216
1217                 /* Remember the absolute time of the original
1218                    request with this mid. We'll use it later to
1219                    see if this has timed out. */
1220
1221                 request_time = pml->request_time;
1222
1223                 /* Remove the deferred open entry under lock. */
1224                 lck = get_share_mode_lock(NULL, state->id, NULL, NULL);
1225                 if (lck == NULL) {
1226                         DEBUG(0, ("could not get share mode lock\n"));
1227                 } else {
1228                         del_deferred_open_entry(lck, req->mid);
1229                         TALLOC_FREE(lck);
1230                 }
1231
1232                 /* Ensure we don't reprocess this message. */
1233                 remove_deferred_open_smb_message(req->mid);
1234         }
1235
1236         status = check_name(conn, fname);
1237         if (!NT_STATUS_IS_OK(status)) {
1238                 return status;
1239         }
1240
1241         if (!posix_open) {
1242                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1243                 if (file_existed) {
1244                         existing_dos_attributes = dos_mode(conn, fname, psbuf);
1245                 }
1246         }
1247
1248         /* ignore any oplock requests if oplocks are disabled */
1249         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1250             IS_VETO_OPLOCK_PATH(conn, fname)) {
1251                 /* Mask off everything except the private Samba bits. */
1252                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1253         }
1254
1255         /* this is for OS/2 long file names - say we don't support them */
1256         if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1257                 /* OS/2 Workplace shell fix may be main code stream in a later
1258                  * release. */
1259                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1260                          "supported.\n"));
1261                 if (use_nt_status()) {
1262                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1263                 }
1264                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1265         }
1266
1267         switch( create_disposition ) {
1268                 /*
1269                  * Currently we're using FILE_SUPERSEDE as the same as
1270                  * FILE_OVERWRITE_IF but they really are
1271                  * different. FILE_SUPERSEDE deletes an existing file
1272                  * (requiring delete access) then recreates it.
1273                  */
1274                 case FILE_SUPERSEDE:
1275                         /* If file exists replace/overwrite. If file doesn't
1276                          * exist create. */
1277                         flags2 |= (O_CREAT | O_TRUNC);
1278                         break;
1279
1280                 case FILE_OVERWRITE_IF:
1281                         /* If file exists replace/overwrite. If file doesn't
1282                          * exist create. */
1283                         flags2 |= (O_CREAT | O_TRUNC);
1284                         break;
1285
1286                 case FILE_OPEN:
1287                         /* If file exists open. If file doesn't exist error. */
1288                         if (!file_existed) {
1289                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1290                                          "requested for file %s and file "
1291                                          "doesn't exist.\n", fname ));
1292                                 errno = ENOENT;
1293                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1294                         }
1295                         break;
1296
1297                 case FILE_OVERWRITE:
1298                         /* If file exists overwrite. If file doesn't exist
1299                          * error. */
1300                         if (!file_existed) {
1301                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1302                                          "requested for file %s and file "
1303                                          "doesn't exist.\n", fname ));
1304                                 errno = ENOENT;
1305                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1306                         }
1307                         flags2 |= O_TRUNC;
1308                         break;
1309
1310                 case FILE_CREATE:
1311                         /* If file exists error. If file doesn't exist
1312                          * create. */
1313                         if (file_existed) {
1314                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1315                                          "requested for file %s and file "
1316                                          "already exists.\n", fname ));
1317                                 if (S_ISDIR(psbuf->st_mode)) {
1318                                         errno = EISDIR;
1319                                 } else {
1320                                         errno = EEXIST;
1321                                 }
1322                                 return map_nt_error_from_unix(errno);
1323                         }
1324                         flags2 |= (O_CREAT|O_EXCL);
1325                         break;
1326
1327                 case FILE_OPEN_IF:
1328                         /* If file exists open. If file doesn't exist
1329                          * create. */
1330                         flags2 |= O_CREAT;
1331                         break;
1332
1333                 default:
1334                         return NT_STATUS_INVALID_PARAMETER;
1335         }
1336
1337         /* We only care about matching attributes on file exists and
1338          * overwrite. */
1339
1340         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1341                              (create_disposition == FILE_OVERWRITE_IF))) {
1342                 if (!open_match_attributes(conn, fname,
1343                                            existing_dos_attributes,
1344                                            new_dos_attributes, psbuf->st_mode,
1345                                            unx_mode, &new_unx_mode)) {
1346                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1347                                  "for file %s (%x %x) (0%o, 0%o)\n",
1348                                  fname, existing_dos_attributes,
1349                                  new_dos_attributes,
1350                                  (unsigned int)psbuf->st_mode,
1351                                  (unsigned int)unx_mode ));
1352                         errno = EACCES;
1353                         return NT_STATUS_ACCESS_DENIED;
1354                 }
1355         }
1356
1357         /* This is a nasty hack - must fix... JRA. */
1358         if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1359                 open_access_mask = access_mask = FILE_GENERIC_ALL;
1360         }
1361
1362         /*
1363          * Convert GENERIC bits to specific bits.
1364          */
1365
1366         se_map_generic(&access_mask, &file_generic_mapping);
1367         open_access_mask = access_mask;
1368
1369         if (flags2 & O_TRUNC) {
1370                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1371         }
1372
1373         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1374                    "access_mask=0x%x\n", fname, access_mask ));
1375
1376         /*
1377          * Note that we ignore the append flag as append does not
1378          * mean the same thing under DOS and Unix.
1379          */
1380
1381         if (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) {
1382                 /* DENY_DOS opens are always underlying read-write on the
1383                    file handle, no matter what the requested access mask
1384                     says. */
1385                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1386                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1387                         flags = O_RDWR;
1388                 } else {
1389                         flags = O_WRONLY;
1390                 }
1391         } else {
1392                 flags = O_RDONLY;
1393         }
1394
1395         /*
1396          * Currently we only look at FILE_WRITE_THROUGH for create options.
1397          */
1398
1399 #if defined(O_SYNC)
1400         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1401                 flags2 |= O_SYNC;
1402         }
1403 #endif /* O_SYNC */
1404
1405         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1406                 flags2 |= O_APPEND;
1407         }
1408
1409         if (!posix_open && !CAN_WRITE(conn)) {
1410                 /*
1411                  * We should really return a permission denied error if either
1412                  * O_CREAT or O_TRUNC are set, but for compatibility with
1413                  * older versions of Samba we just AND them out.
1414                  */
1415                 flags2 &= ~(O_CREAT|O_TRUNC);
1416         }
1417
1418         /*
1419          * Ensure we can't write on a read-only share or file.
1420          */
1421
1422         if (flags != O_RDONLY && file_existed &&
1423             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1424                 DEBUG(5,("open_file_ntcreate: write access requested for "
1425                          "file %s on read only %s\n",
1426                          fname, !CAN_WRITE(conn) ? "share" : "file" ));
1427                 errno = EACCES;
1428                 return NT_STATUS_ACCESS_DENIED;
1429         }
1430
1431         status = file_new(conn, &fsp);
1432         if(!NT_STATUS_IS_OK(status)) {
1433                 return status;
1434         }
1435
1436         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1437         fsp->share_access = share_access;
1438         fsp->fh->private_options = create_options;
1439         fsp->access_mask = open_access_mask; /* We change this to the
1440                                               * requested access_mask after
1441                                               * the open is done. */
1442         fsp->posix_open = posix_open;
1443
1444         /* Ensure no SAMBA_PRIVATE bits can be set. */
1445         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1446
1447         if (timeval_is_zero(&request_time)) {
1448                 request_time = fsp->open_time;
1449         }
1450
1451         if (file_existed) {
1452                 id = vfs_file_id_from_sbuf(conn, psbuf);
1453
1454                 lck = get_share_mode_lock(NULL, id,
1455                                           conn->connectpath,
1456                                           fname);
1457
1458                 if (lck == NULL) {
1459                         file_free(fsp);
1460                         DEBUG(0, ("Could not get share mode lock\n"));
1461                         return NT_STATUS_SHARING_VIOLATION;
1462                 }
1463
1464                 /* First pass - send break only on batch oplocks. */
1465                 if ((req != NULL)
1466                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1467                                          oplock_request)) {
1468                         schedule_defer_open(lck, request_time, req);
1469                         TALLOC_FREE(lck);
1470                         file_free(fsp);
1471                         return NT_STATUS_SHARING_VIOLATION;
1472                 }
1473
1474                 /* Use the client requested access mask here, not the one we
1475                  * open with. */
1476                 status = open_mode_check(conn, fname, lck,
1477                                          access_mask, share_access,
1478                                          create_options, &file_existed);
1479
1480                 if (NT_STATUS_IS_OK(status)) {
1481                         /* We might be going to allow this open. Check oplock
1482                          * status again. */
1483                         /* Second pass - send break for both batch or
1484                          * exclusive oplocks. */
1485                         if ((req != NULL)
1486                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1487                                                   oplock_request)) {
1488                                 schedule_defer_open(lck, request_time, req);
1489                                 TALLOC_FREE(lck);
1490                                 file_free(fsp);
1491                                 return NT_STATUS_SHARING_VIOLATION;
1492                         }
1493                 }
1494
1495                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1496                         /* DELETE_PENDING is not deferred for a second */
1497                         TALLOC_FREE(lck);
1498                         file_free(fsp);
1499                         return status;
1500                 }
1501
1502                 if (!NT_STATUS_IS_OK(status)) {
1503                         uint32 can_access_mask;
1504                         bool can_access = True;
1505
1506                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1507
1508                         /* Check if this can be done with the deny_dos and fcb
1509                          * calls. */
1510                         if (create_options &
1511                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1512                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1513                                 files_struct *fsp_dup;
1514
1515                                 if (req == NULL) {
1516                                         DEBUG(0, ("DOS open without an SMB "
1517                                                   "request!\n"));
1518                                         TALLOC_FREE(lck);
1519                                         file_free(fsp);
1520                                         return NT_STATUS_INTERNAL_ERROR;
1521                                 }
1522
1523                                 /* Use the client requested access mask here,
1524                                  * not the one we open with. */
1525                                 fsp_dup = fcb_or_dos_open(conn, fname, id,
1526                                                           req->smbpid,
1527                                                           req->vuid,
1528                                                           access_mask,
1529                                                           share_access,
1530                                                           create_options);
1531
1532                                 if (fsp_dup) {
1533                                         TALLOC_FREE(lck);
1534                                         file_free(fsp);
1535                                         if (pinfo) {
1536                                                 *pinfo = FILE_WAS_OPENED;
1537                                         }
1538                                         conn->num_files_open++;
1539                                         *result = fsp_dup;
1540                                         return NT_STATUS_OK;
1541                                 }
1542                         }
1543
1544                         /*
1545                          * This next line is a subtlety we need for
1546                          * MS-Access. If a file open will fail due to share
1547                          * permissions and also for security (access) reasons,
1548                          * we need to return the access failed error, not the
1549                          * share error. We can't open the file due to kernel
1550                          * oplock deadlock (it's possible we failed above on
1551                          * the open_mode_check()) so use a userspace check.
1552                          */
1553
1554                         if (flags & O_RDWR) {
1555                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1556                         } else if (flags & O_WRONLY) {
1557                                 can_access_mask = FILE_WRITE_DATA;
1558                         } else {
1559                                 can_access_mask = FILE_READ_DATA;
1560                         }
1561
1562                         if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1563                             !can_access_file(conn,fname,psbuf,can_access_mask)) {
1564                                 can_access = False;
1565                         }
1566
1567                         /*
1568                          * If we're returning a share violation, ensure we
1569                          * cope with the braindead 1 second delay.
1570                          */
1571
1572                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1573                             lp_defer_sharing_violations()) {
1574                                 struct timeval timeout;
1575                                 struct deferred_open_record state;
1576                                 int timeout_usecs;
1577
1578                                 /* this is a hack to speed up torture tests
1579                                    in 'make test' */
1580                                 timeout_usecs = lp_parm_int(SNUM(conn),
1581                                                             "smbd","sharedelay",
1582                                                             SHARING_VIOLATION_USEC_WAIT);
1583
1584                                 /* This is a relative time, added to the absolute
1585                                    request_time value to get the absolute timeout time.
1586                                    Note that if this is the second or greater time we enter
1587                                    this codepath for this particular request mid then
1588                                    request_time is left as the absolute time of the *first*
1589                                    time this request mid was processed. This is what allows
1590                                    the request to eventually time out. */
1591
1592                                 timeout = timeval_set(0, timeout_usecs);
1593
1594                                 /* Nothing actually uses state.delayed_for_oplocks
1595                                    but it's handy to differentiate in debug messages
1596                                    between a 30 second delay due to oplock break, and
1597                                    a 1 second delay for share mode conflicts. */
1598
1599                                 state.delayed_for_oplocks = False;
1600                                 state.id = id;
1601
1602                                 if ((req != NULL)
1603                                     && !request_timed_out(request_time,
1604                                                           timeout)) {
1605                                         defer_open(lck, request_time, timeout,
1606                                                    req, &state);
1607                                 }
1608                         }
1609
1610                         TALLOC_FREE(lck);
1611                         if (can_access) {
1612                                 /*
1613                                  * We have detected a sharing violation here
1614                                  * so return the correct error code
1615                                  */
1616                                 status = NT_STATUS_SHARING_VIOLATION;
1617                         } else {
1618                                 status = NT_STATUS_ACCESS_DENIED;
1619                         }
1620                         file_free(fsp);
1621                         return status;
1622                 }
1623
1624                 /*
1625                  * We exit this block with the share entry *locked*.....
1626                  */
1627         }
1628
1629         SMB_ASSERT(!file_existed || (lck != NULL));
1630
1631         /*
1632          * Ensure we pay attention to default ACLs on directories if required.
1633          */
1634
1635         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1636             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1637                 unx_mode = 0777;
1638         }
1639
1640         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1641                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1642                  (unsigned int)flags, (unsigned int)flags2,
1643                  (unsigned int)unx_mode, (unsigned int)access_mask,
1644                  (unsigned int)open_access_mask));
1645
1646         /*
1647          * open_file strips any O_TRUNC flags itself.
1648          */
1649
1650         fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1651                              flags|flags2, unx_mode, access_mask,
1652                              open_access_mask);
1653
1654         if (!NT_STATUS_IS_OK(fsp_open)) {
1655                 if (lck != NULL) {
1656                         TALLOC_FREE(lck);
1657                 }
1658                 file_free(fsp);
1659                 return fsp_open;
1660         }
1661
1662         if (!file_existed) {
1663
1664                 /*
1665                  * Deal with the race condition where two smbd's detect the
1666                  * file doesn't exist and do the create at the same time. One
1667                  * of them will win and set a share mode, the other (ie. this
1668                  * one) should check if the requested share mode for this
1669                  * create is allowed.
1670                  */
1671
1672                 /*
1673                  * Now the file exists and fsp is successfully opened,
1674                  * fsp->dev and fsp->inode are valid and should replace the
1675                  * dev=0,inode=0 from a non existent file. Spotted by
1676                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1677                  */
1678
1679                 id = fsp->file_id;
1680
1681                 lck = get_share_mode_lock(NULL, id,
1682                                           conn->connectpath,
1683                                           fname);
1684
1685                 if (lck == NULL) {
1686                         DEBUG(0, ("open_file_ntcreate: Could not get share "
1687                                   "mode lock for %s\n", fname));
1688                         fd_close(fsp);
1689                         file_free(fsp);
1690                         return NT_STATUS_SHARING_VIOLATION;
1691                 }
1692
1693                 /* First pass - send break only on batch oplocks. */
1694                 if ((req != NULL)
1695                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1696                                          oplock_request)) {
1697                         schedule_defer_open(lck, request_time, req);
1698                         TALLOC_FREE(lck);
1699                         fd_close(fsp);
1700                         file_free(fsp);
1701                         return NT_STATUS_SHARING_VIOLATION;
1702                 }
1703
1704                 status = open_mode_check(conn, fname, lck,
1705                                          access_mask, share_access,
1706                                          create_options, &file_existed);
1707
1708                 if (NT_STATUS_IS_OK(status)) {
1709                         /* We might be going to allow this open. Check oplock
1710                          * status again. */
1711                         /* Second pass - send break for both batch or
1712                          * exclusive oplocks. */
1713                         if ((req != NULL)
1714                             && delay_for_oplocks(lck, fsp, req->mid, 2,
1715                                                  oplock_request)) {
1716                                 schedule_defer_open(lck, request_time, req);
1717                                 TALLOC_FREE(lck);
1718                                 fd_close(fsp);
1719                                 file_free(fsp);
1720                                 return NT_STATUS_SHARING_VIOLATION;
1721                         }
1722                 }
1723
1724                 if (!NT_STATUS_IS_OK(status)) {
1725                         struct deferred_open_record state;
1726
1727                         fd_close(fsp);
1728                         file_free(fsp);
1729
1730                         state.delayed_for_oplocks = False;
1731                         state.id = id;
1732
1733                         /* Do it all over again immediately. In the second
1734                          * round we will find that the file existed and handle
1735                          * the DELETE_PENDING and FCB cases correctly. No need
1736                          * to duplicate the code here. Essentially this is a
1737                          * "goto top of this function", but don't tell
1738                          * anybody... */
1739
1740                         if (req != NULL) {
1741                                 defer_open(lck, request_time, timeval_zero(),
1742                                            req, &state);
1743                         }
1744                         TALLOC_FREE(lck);
1745                         return status;
1746                 }
1747
1748                 /*
1749                  * We exit this block with the share entry *locked*.....
1750                  */
1751
1752         }
1753
1754         SMB_ASSERT(lck != NULL);
1755
1756         /* note that we ignore failure for the following. It is
1757            basically a hack for NFS, and NFS will never set one of
1758            these only read them. Nobody but Samba can ever set a deny
1759            mode and we have already checked our more authoritative
1760            locking database for permission to set this deny mode. If
1761            the kernel refuses the operations then the kernel is wrong.
1762            note that GPFS supports it as well - jmcd */
1763
1764         ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1765         if(ret_flock == -1 ){
1766
1767                 TALLOC_FREE(lck);
1768                 fd_close(fsp);
1769                 file_free(fsp);
1770
1771                 return NT_STATUS_SHARING_VIOLATION;
1772         }
1773
1774         /*
1775          * At this point onwards, we can guarentee that the share entry
1776          * is locked, whether we created the file or not, and that the
1777          * deny mode is compatible with all current opens.
1778          */
1779
1780         /*
1781          * If requested, truncate the file.
1782          */
1783
1784         if (flags2&O_TRUNC) {
1785                 /*
1786                  * We are modifing the file after open - update the stat
1787                  * struct..
1788                  */
1789                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1790                     (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1791                         status = map_nt_error_from_unix(errno);
1792                         TALLOC_FREE(lck);
1793                         fd_close(fsp);
1794                         file_free(fsp);
1795                         return status;
1796                 }
1797         }
1798
1799         /* Record the options we were opened with. */
1800         fsp->share_access = share_access;
1801         fsp->fh->private_options = create_options;
1802         fsp->access_mask = access_mask;
1803
1804         if (file_existed) {
1805                 /* stat opens on existing files don't get oplocks. */
1806                 if (is_stat_open(open_access_mask)) {
1807                         fsp->oplock_type = NO_OPLOCK;
1808                 }
1809
1810                 if (!(flags2 & O_TRUNC)) {
1811                         info = FILE_WAS_OPENED;
1812                 } else {
1813                         info = FILE_WAS_OVERWRITTEN;
1814                 }
1815         } else {
1816                 info = FILE_WAS_CREATED;
1817         }
1818
1819         if (pinfo) {
1820                 *pinfo = info;
1821         }
1822
1823         /*
1824          * Setup the oplock info in both the shared memory and
1825          * file structs.
1826          */
1827
1828         if ((fsp->oplock_type != NO_OPLOCK) &&
1829             (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1830                 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1831                         /* Could not get the kernel oplock */
1832                         fsp->oplock_type = NO_OPLOCK;
1833                 }
1834         }
1835
1836         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1837                 new_file_created = True;
1838         }
1839
1840         set_share_mode(lck, fsp, current_user.ut.uid, 0, fsp->oplock_type, new_file_created);
1841
1842         /* Handle strange delete on close create semantics. */
1843         if ((create_options & FILE_DELETE_ON_CLOSE) && can_set_initial_delete_on_close(lck)) {
1844                 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1845
1846                 if (!NT_STATUS_IS_OK(status)) {
1847                         /* Remember to delete the mode we just added. */
1848                         del_share_mode(lck, fsp);
1849                         TALLOC_FREE(lck);
1850                         fd_close(fsp);
1851                         file_free(fsp);
1852                         return status;
1853                 }
1854                 /* Note that here we set the *inital* delete on close flag,
1855                    not the regular one. The magic gets handled in close. */
1856                 fsp->initial_delete_on_close = True;
1857         }
1858
1859         if (new_file_created) {
1860                 /* Files should be initially set as archive */
1861                 if (lp_map_archive(SNUM(conn)) ||
1862                     lp_store_dos_attributes(SNUM(conn))) {
1863                         if (!posix_open) {
1864                                 SMB_STRUCT_STAT tmp_sbuf;
1865                                 SET_STAT_INVALID(tmp_sbuf);
1866                                 if (file_set_dosmode(
1867                                             conn, fname,
1868                                             new_dos_attributes | aARCH,
1869                                             &tmp_sbuf, parent_dir,
1870                                             true) == 0) {
1871                                         unx_mode = tmp_sbuf.st_mode;
1872                                 }
1873                         }
1874                 }
1875         }
1876
1877         /*
1878          * Take care of inherited ACLs on created files - if default ACL not
1879          * selected.
1880          */
1881
1882         if (!posix_open && !file_existed && !def_acl) {
1883
1884                 int saved_errno = errno; /* We might get ENOSYS in the next
1885                                           * call.. */
1886
1887                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1888                     errno == ENOSYS) {
1889                         errno = saved_errno; /* Ignore ENOSYS */
1890                 }
1891
1892         } else if (new_unx_mode) {
1893
1894                 int ret = -1;
1895
1896                 /* Attributes need changing. File already existed. */
1897
1898                 {
1899                         int saved_errno = errno; /* We might get ENOSYS in the
1900                                                   * next call.. */
1901                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1902
1903                         if (ret == -1 && errno == ENOSYS) {
1904                                 errno = saved_errno; /* Ignore ENOSYS */
1905                         } else {
1906                                 DEBUG(5, ("open_file_ntcreate: reset "
1907                                           "attributes of file %s to 0%o\n",
1908                                           fname, (unsigned int)new_unx_mode));
1909                                 ret = 0; /* Don't do the fchmod below. */
1910                         }
1911                 }
1912
1913                 if ((ret == -1) &&
1914                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1915                         DEBUG(5, ("open_file_ntcreate: failed to reset "
1916                                   "attributes of file %s to 0%o\n",
1917                                   fname, (unsigned int)new_unx_mode));
1918         }
1919
1920         /* If this is a successful open, we must remove any deferred open
1921          * records. */
1922         if (req != NULL) {
1923                 del_deferred_open_entry(lck, req->mid);
1924         }
1925         TALLOC_FREE(lck);
1926
1927         conn->num_files_open++;
1928
1929         *result = fsp;
1930         return NT_STATUS_OK;
1931 }
1932
1933 /****************************************************************************
1934  Open a file for for write to ensure that we can fchmod it.
1935 ****************************************************************************/
1936
1937 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1938                           SMB_STRUCT_STAT *psbuf, files_struct **result)
1939 {
1940         files_struct *fsp = NULL;
1941         NTSTATUS status;
1942
1943         if (!VALID_STAT(*psbuf)) {
1944                 return NT_STATUS_INVALID_PARAMETER;
1945         }
1946
1947         status = file_new(conn, &fsp);
1948         if(!NT_STATUS_IS_OK(status)) {
1949                 return status;
1950         }
1951
1952         /* note! we must use a non-zero desired access or we don't get
1953            a real file descriptor. Oh what a twisted web we weave. */
1954         status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1955                            0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1956
1957         /*
1958          * This is not a user visible file open.
1959          * Don't set a share mode and don't increment
1960          * the conn->num_files_open.
1961          */
1962
1963         if (!NT_STATUS_IS_OK(status)) {
1964                 file_free(fsp);
1965                 return status;
1966         }
1967
1968         *result = fsp;
1969         return NT_STATUS_OK;
1970 }
1971
1972 /****************************************************************************
1973  Close the fchmod file fd - ensure no locks are lost.
1974 ****************************************************************************/
1975
1976 NTSTATUS close_file_fchmod(files_struct *fsp)
1977 {
1978         NTSTATUS status = fd_close(fsp);
1979         file_free(fsp);
1980         return status;
1981 }
1982
1983 static NTSTATUS mkdir_internal(connection_struct *conn,
1984                                 const char *name,
1985                                 uint32 file_attributes,
1986                                 SMB_STRUCT_STAT *psbuf)
1987 {
1988         mode_t mode;
1989         char *parent_dir;
1990         const char *dirname;
1991         NTSTATUS status;
1992         bool posix_open = false;
1993
1994         if(!CAN_WRITE(conn)) {
1995                 DEBUG(5,("mkdir_internal: failing create on read-only share "
1996                          "%s\n", lp_servicename(SNUM(conn))));
1997                 return NT_STATUS_ACCESS_DENIED;
1998         }
1999
2000         status = check_name(conn, name);
2001         if (!NT_STATUS_IS_OK(status)) {
2002                 return status;
2003         }
2004
2005         if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2006                                    &dirname)) {
2007                 return NT_STATUS_NO_MEMORY;
2008         }
2009
2010         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2011                 posix_open = true;
2012                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2013         } else {
2014                 mode = unix_mode(conn, aDIR, name, parent_dir);
2015         }
2016
2017         if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2018                 return map_nt_error_from_unix(errno);
2019         }
2020
2021         /* Ensure we're checking for a symlink here.... */
2022         /* We don't want to get caught by a symlink racer. */
2023
2024         if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2025                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2026                           name, strerror(errno)));
2027                 return map_nt_error_from_unix(errno);
2028         }
2029
2030         if (!S_ISDIR(psbuf->st_mode)) {
2031                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2032                           name));
2033                 return NT_STATUS_ACCESS_DENIED;
2034         }
2035
2036         if (lp_store_dos_attributes(SNUM(conn))) {
2037                 if (!posix_open) {
2038                         file_set_dosmode(conn, name,
2039                                  file_attributes | aDIR, NULL,
2040                                  parent_dir,
2041                                  true);
2042                 }
2043         }
2044
2045         if (lp_inherit_perms(SNUM(conn))) {
2046                 inherit_access_acl(conn, parent_dir, name, mode);
2047         }
2048
2049         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2050                 /*
2051                  * Check if high bits should have been set,
2052                  * then (if bits are missing): add them.
2053                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2054                  * dir.
2055                  */
2056                 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2057                         SMB_VFS_CHMOD(conn, name,
2058                                       psbuf->st_mode | (mode & ~psbuf->st_mode));
2059                 }
2060         }
2061
2062         /* Change the owner if required. */
2063         if (lp_inherit_owner(SNUM(conn))) {
2064                 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2065         }
2066
2067         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2068                      name);
2069
2070         return NT_STATUS_OK;
2071 }
2072
2073 /****************************************************************************
2074  Open a directory from an NT SMB call.
2075 ****************************************************************************/
2076
2077 NTSTATUS open_directory(connection_struct *conn,
2078                         struct smb_request *req,
2079                         const char *fname,
2080                         SMB_STRUCT_STAT *psbuf,
2081                         uint32 access_mask,
2082                         uint32 share_access,
2083                         uint32 create_disposition,
2084                         uint32 create_options,
2085                         uint32 file_attributes,
2086                         int *pinfo,
2087                         files_struct **result)
2088 {
2089         files_struct *fsp = NULL;
2090         bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2091         struct share_mode_lock *lck = NULL;
2092         NTSTATUS status;
2093         int info = 0;
2094
2095         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2096                  "share_access = 0x%x create_options = 0x%x, "
2097                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2098                  fname,
2099                  (unsigned int)access_mask,
2100                  (unsigned int)share_access,
2101                  (unsigned int)create_options,
2102                  (unsigned int)create_disposition,
2103                  (unsigned int)file_attributes));
2104
2105         if (is_ntfs_stream_name(fname)) {
2106                 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2107                 return NT_STATUS_NOT_A_DIRECTORY;
2108         }
2109
2110         switch( create_disposition ) {
2111                 case FILE_OPEN:
2112
2113                         info = FILE_WAS_OPENED;
2114
2115                         /*
2116                          * We want to follow symlinks here.
2117                          */
2118
2119                         if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2120                                 return map_nt_error_from_unix(errno);
2121                         }
2122
2123                         break;
2124
2125                 case FILE_CREATE:
2126
2127                         /* If directory exists error. If directory doesn't
2128                          * exist create. */
2129
2130                         status = mkdir_internal(conn,
2131                                                 fname,
2132                                                 file_attributes,
2133                                                 psbuf);
2134
2135                         if (!NT_STATUS_IS_OK(status)) {
2136                                 DEBUG(2, ("open_directory: unable to create "
2137                                           "%s. Error was %s\n", fname,
2138                                           nt_errstr(status)));
2139                                 return status;
2140                         }
2141
2142                         info = FILE_WAS_CREATED;
2143                         break;
2144
2145                 case FILE_OPEN_IF:
2146                         /*
2147                          * If directory exists open. If directory doesn't
2148                          * exist create.
2149                          */
2150
2151                         status = mkdir_internal(conn,
2152                                                 fname,
2153                                                 file_attributes,
2154                                                 psbuf);
2155
2156                         if (NT_STATUS_IS_OK(status)) {
2157                                 info = FILE_WAS_CREATED;
2158                         }
2159
2160                         if (NT_STATUS_EQUAL(status,
2161                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2162                                 info = FILE_WAS_OPENED;
2163                                 status = NT_STATUS_OK;
2164                         }
2165
2166                         break;
2167
2168                 case FILE_SUPERSEDE:
2169                 case FILE_OVERWRITE:
2170                 case FILE_OVERWRITE_IF:
2171                 default:
2172                         DEBUG(5,("open_directory: invalid create_disposition "
2173                                  "0x%x for directory %s\n",
2174                                  (unsigned int)create_disposition, fname));
2175                         return NT_STATUS_INVALID_PARAMETER;
2176         }
2177
2178         if(!S_ISDIR(psbuf->st_mode)) {
2179                 DEBUG(5,("open_directory: %s is not a directory !\n",
2180                          fname ));
2181                 return NT_STATUS_NOT_A_DIRECTORY;
2182         }
2183
2184         status = file_new(conn, &fsp);
2185         if(!NT_STATUS_IS_OK(status)) {
2186                 return status;
2187         }
2188
2189         /*
2190          * Setup the files_struct for it.
2191          */
2192
2193         fsp->mode = psbuf->st_mode;
2194         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2195         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2196         fsp->file_pid = req ? req->smbpid : 0;
2197         fsp->can_lock = False;
2198         fsp->can_read = False;
2199         fsp->can_write = False;
2200
2201         fsp->share_access = share_access;
2202         fsp->fh->private_options = create_options;
2203         fsp->access_mask = access_mask;
2204
2205         fsp->print_file = False;
2206         fsp->modified = False;
2207         fsp->oplock_type = NO_OPLOCK;
2208         fsp->sent_oplock_break = NO_BREAK_SENT;
2209         fsp->is_directory = True;
2210         fsp->is_stat = False;
2211         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2212
2213         string_set(&fsp->fsp_name,fname);
2214
2215         lck = get_share_mode_lock(NULL, fsp->file_id,
2216                                   conn->connectpath,
2217                                   fname);
2218
2219         if (lck == NULL) {
2220                 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2221                 file_free(fsp);
2222                 return NT_STATUS_SHARING_VIOLATION;
2223         }
2224
2225         status = open_mode_check(conn, fname, lck,
2226                                 access_mask, share_access,
2227                                 create_options, &dir_existed);
2228
2229         if (!NT_STATUS_IS_OK(status)) {
2230                 TALLOC_FREE(lck);
2231                 file_free(fsp);
2232                 return status;
2233         }
2234
2235         set_share_mode(lck, fsp, current_user.ut.uid, 0, NO_OPLOCK, True);
2236
2237         /* For directories the delete on close bit at open time seems
2238            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2239         if (create_options & FILE_DELETE_ON_CLOSE) {
2240                 status = can_set_delete_on_close(fsp, True, 0);
2241                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2242                         TALLOC_FREE(lck);
2243                         file_free(fsp);
2244                         return status;
2245                 }
2246
2247                 if (NT_STATUS_IS_OK(status)) {
2248                         /* Note that here we set the *inital* delete on close flag,
2249                            not the regular one. The magic gets handled in close. */
2250                         fsp->initial_delete_on_close = True;
2251                 }
2252         }
2253
2254         TALLOC_FREE(lck);
2255
2256         if (pinfo) {
2257                 *pinfo = info;
2258         }
2259
2260         conn->num_files_open++;
2261
2262         *result = fsp;
2263         return NT_STATUS_OK;
2264 }
2265
2266 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2267 {
2268         NTSTATUS status;
2269         SMB_STRUCT_STAT sbuf;
2270         files_struct *fsp;
2271
2272         SET_STAT_INVALID(sbuf);
2273
2274         status = open_directory(conn, req, directory, &sbuf,
2275                                 FILE_READ_ATTRIBUTES, /* Just a stat open */
2276                                 FILE_SHARE_NONE, /* Ignored for stat opens */
2277                                 FILE_CREATE,
2278                                 0,
2279                                 FILE_ATTRIBUTE_DIRECTORY,
2280                                 NULL,
2281                                 &fsp);
2282
2283         if (NT_STATUS_IS_OK(status)) {
2284                 close_file(fsp, NORMAL_CLOSE);
2285         }
2286
2287         return status;
2288 }
2289
2290 /****************************************************************************
2291  Open a pseudo-file (no locking checks - a 'stat' open).
2292 ****************************************************************************/
2293
2294 NTSTATUS open_file_stat(connection_struct *conn, struct smb_request *req,
2295                         const char *fname, SMB_STRUCT_STAT *psbuf,
2296                         files_struct **result)
2297 {
2298         files_struct *fsp = NULL;
2299         NTSTATUS status;
2300
2301         if (!VALID_STAT(*psbuf)) {
2302                 return NT_STATUS_INVALID_PARAMETER;
2303         }
2304
2305         /* Can't 'stat' open directories. */
2306         if(S_ISDIR(psbuf->st_mode)) {
2307                 return NT_STATUS_FILE_IS_A_DIRECTORY;
2308         }
2309
2310         status = file_new(conn, &fsp);
2311         if(!NT_STATUS_IS_OK(status)) {
2312                 return status;
2313         }
2314
2315         DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));
2316
2317         /*
2318          * Setup the files_struct for it.
2319          */
2320
2321         fsp->mode = psbuf->st_mode;
2322         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2323         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2324         fsp->file_pid = req ? req->smbpid : 0;
2325         fsp->can_lock = False;
2326         fsp->can_read = False;
2327         fsp->can_write = False;
2328         fsp->print_file = False;
2329         fsp->modified = False;
2330         fsp->oplock_type = NO_OPLOCK;
2331         fsp->sent_oplock_break = NO_BREAK_SENT;
2332         fsp->is_directory = False;
2333         fsp->is_stat = True;
2334         string_set(&fsp->fsp_name,fname);
2335
2336         conn->num_files_open++;
2337
2338         *result = fsp;
2339         return NT_STATUS_OK;
2340 }
2341
2342 /****************************************************************************
2343  Receive notification that one of our open files has been renamed by another
2344  smbd process.
2345 ****************************************************************************/
2346
2347 void msg_file_was_renamed(struct messaging_context *msg,
2348                           void *private_data,
2349                           uint32_t msg_type,
2350                           struct server_id server_id,
2351                           DATA_BLOB *data)
2352 {
2353         files_struct *fsp;
2354         char *frm = (char *)data->data;
2355         struct file_id id;
2356         const char *sharepath;
2357         const char *newname;
2358         size_t sp_len;
2359
2360         if (data->data == NULL
2361             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2362                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2363                           (int)data->length));
2364                 return;
2365         }
2366
2367         /* Unpack the message. */
2368         pull_file_id_16(frm, &id);
2369         sharepath = &frm[16];
2370         newname = sharepath + strlen(sharepath) + 1;
2371         sp_len = strlen(sharepath);
2372
2373         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2374                 "file_id %s\n",
2375                   sharepath, newname, file_id_string_tos(&id)));
2376
2377         for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2378                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2379                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2380                                 fsp->fnum, fsp->fsp_name, newname ));
2381                         string_set(&fsp->fsp_name, newname);
2382                 } else {
2383                         /* TODO. JRA. */
2384                         /* Now we have the complete path we can work out if this is
2385                            actually within this share and adjust newname accordingly. */
2386                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2387                                 "not sharepath %s) "
2388                                 "fnum %d from %s -> %s\n",
2389                                 fsp->conn->connectpath,
2390                                 sharepath,
2391                                 fsp->fnum,
2392                                 fsp->fsp_name,
2393                                 newname ));
2394                 }
2395         }
2396 }
2397
2398 struct case_semantics_state {
2399         connection_struct *conn;
2400         bool case_sensitive;
2401         bool case_preserve;
2402         bool short_case_preserve;
2403 };
2404
2405 /****************************************************************************
2406  Restore case semantics.
2407 ****************************************************************************/
2408 static int restore_case_semantics(struct case_semantics_state *state)
2409 {
2410         state->conn->case_sensitive = state->case_sensitive;
2411         state->conn->case_preserve = state->case_preserve;
2412         state->conn->short_case_preserve = state->short_case_preserve;
2413         return 0;
2414 }
2415
2416 /****************************************************************************
2417  Save case semantics.
2418 ****************************************************************************/
2419 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2420                                                              connection_struct *conn)
2421 {
2422         struct case_semantics_state *result;
2423
2424         if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2425                 DEBUG(0, ("talloc failed\n"));
2426                 return NULL;
2427         }
2428
2429         result->conn = conn;
2430         result->case_sensitive = conn->case_sensitive;
2431         result->case_preserve = conn->case_preserve;
2432         result->short_case_preserve = conn->short_case_preserve;
2433
2434         /* Set to POSIX. */
2435         conn->case_sensitive = True;
2436         conn->case_preserve = True;
2437         conn->short_case_preserve = True;
2438
2439         talloc_set_destructor(result, restore_case_semantics);
2440
2441         return result;
2442 }
2443
2444 /*
2445  * Wrapper around open_file_ntcreate and open_directory
2446  */
2447
2448 NTSTATUS create_file_unixpath(connection_struct *conn,
2449                               struct smb_request *req,
2450                               const char *fname,
2451                               uint32_t access_mask,
2452                               uint32_t share_access,
2453                               uint32_t create_disposition,
2454                               uint32_t create_options,
2455                               uint32_t file_attributes,
2456                               uint32_t oplock_request,
2457                               SMB_BIG_UINT allocation_size,
2458                               struct security_descriptor *sd,
2459                               struct ea_list *ea_list,
2460
2461                               files_struct **result,
2462                               int *pinfo,
2463                               SMB_STRUCT_STAT *psbuf)
2464 {
2465         SMB_STRUCT_STAT sbuf;
2466         int info = FILE_WAS_OPENED;
2467         files_struct *fsp = NULL;
2468         NTSTATUS status;
2469
2470         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2471                   "file_attributes = 0x%x, share_access = 0x%x, "
2472                   "create_disposition = 0x%x create_options = 0x%x "
2473                   "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2474                   "fname = %s\n",
2475                   (unsigned int)access_mask,
2476                   (unsigned int)file_attributes,
2477                   (unsigned int)share_access,
2478                   (unsigned int)create_disposition,
2479                   (unsigned int)create_options,
2480                   (unsigned int)oplock_request,
2481                   ea_list, sd, fname));
2482
2483         if (create_options & FILE_OPEN_BY_FILE_ID) {
2484                 status = NT_STATUS_NOT_SUPPORTED;
2485                 goto fail;
2486         }
2487
2488         if (req == NULL) {
2489                 oplock_request |= INTERNAL_OPEN_ONLY;
2490         }
2491
2492         if (psbuf != NULL) {
2493                 sbuf = *psbuf;
2494         }
2495         else {
2496                 SET_STAT_INVALID(sbuf);
2497         }
2498
2499         /* This is the correct thing to do (check every time) but can_delete
2500          * is expensive (it may have to read the parent directory
2501          * permissions). So for now we're not doing it unless we have a strong
2502          * hint the client is really going to delete this file. If the client
2503          * is forcing FILE_CREATE let the filesystem take care of the
2504          * permissions. */
2505
2506         /* Setting FILE_SHARE_DELETE is the hint. */
2507
2508         if (lp_acl_check_permissions(SNUM(conn))
2509             && (create_disposition != FILE_CREATE)
2510             && (share_access & FILE_SHARE_DELETE)
2511             && (access_mask & DELETE_ACCESS)
2512             && (((dos_mode(conn, fname, &sbuf) & FILE_ATTRIBUTE_READONLY)
2513                  && !lp_delete_readonly(SNUM(conn)))
2514                 || !can_delete_file_in_directory(conn, fname))) {
2515                 status = NT_STATUS_ACCESS_DENIED;
2516                 goto fail;
2517         }
2518
2519 #if 0
2520         /* We need to support SeSecurityPrivilege for this. */
2521         if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2522             !user_has_privileges(current_user.nt_user_token,
2523                                  &se_security)) {
2524                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2525                 goto fail;
2526         }
2527 #endif
2528
2529         /*
2530          * If it's a request for a directory open, deal with it separately.
2531          */
2532
2533         if (create_options & FILE_DIRECTORY_FILE) {
2534
2535                 /* Can't open a temp directory. IFS kit test. */
2536                 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2537                         status = NT_STATUS_INVALID_PARAMETER;
2538                         goto fail;
2539                 }
2540
2541                 /*
2542                  * We will get a create directory here if the Win32
2543                  * app specified a security descriptor in the
2544                  * CreateDirectory() call.
2545                  */
2546
2547                 oplock_request = 0;
2548                 status = open_directory(
2549                         conn, req, fname, &sbuf, access_mask, share_access,
2550                         create_disposition, create_options, file_attributes,
2551                         &info, &fsp);
2552         } else {
2553
2554                 /*
2555                  * Ordinary file case.
2556                  */
2557
2558                 status = open_file_ntcreate(
2559                         conn, req, fname, &sbuf, access_mask, share_access,
2560                         create_disposition, create_options, file_attributes,
2561                         oplock_request, &info, &fsp);
2562
2563                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2564
2565                         /*
2566                          * Fail the open if it was explicitly a non-directory
2567                          * file.
2568                          */
2569
2570                         if (create_options & FILE_NON_DIRECTORY_FILE) {
2571                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2572                                 goto fail;
2573                         }
2574
2575                         oplock_request = 0;
2576                         status = open_directory(
2577                                 conn, req, fname, &sbuf, access_mask,
2578                                 share_access, create_disposition,
2579                                 create_options, file_attributes,
2580                                 &info, &fsp);
2581                 }
2582         }
2583
2584         if (!NT_STATUS_IS_OK(status)) {
2585                 goto fail;
2586         }
2587
2588         /*
2589          * According to the MS documentation, the only time the security
2590          * descriptor is applied to the opened file is iff we *created* the
2591          * file; an existing file stays the same.
2592          *
2593          * Also, it seems (from observation) that you can open the file with
2594          * any access mask but you can still write the sd. We need to override
2595          * the granted access before we call set_sd
2596          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2597          */
2598
2599         if ((sd != NULL) && (info == FILE_WAS_CREATED)
2600             && lp_nt_acl_support(SNUM(conn))) {
2601
2602                 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2603                 uint32_t saved_access_mask = fsp->access_mask;
2604
2605                 if (sd->owner_sid == NULL) {
2606                         sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2607                 }
2608                 if (sd->group_sid == NULL) {
2609                         sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2610                 }
2611                 if (sd->sacl == NULL) {
2612                         sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2613                 }
2614                 if (sd->dacl == NULL) {
2615                         sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2616                 }
2617
2618                 fsp->access_mask = FILE_GENERIC_ALL;
2619
2620                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2621
2622                 fsp->access_mask = saved_access_mask;
2623
2624                 if (!NT_STATUS_IS_OK(status)) {
2625                         goto fail;
2626                 }
2627         }
2628
2629         if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2630                 status = set_ea(conn, fsp, fname, ea_list);
2631                 if (!NT_STATUS_IS_OK(status)) {
2632                         goto fail;
2633                 }
2634         }
2635
2636         if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2637                 status = NT_STATUS_ACCESS_DENIED;
2638                 goto fail;
2639         }
2640
2641         /* Save the requested allocation size. */
2642         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2643                 if (allocation_size
2644                     && (allocation_size > sbuf.st_size)) {
2645                         fsp->initial_allocation_size = smb_roundup(
2646                                 fsp->conn, allocation_size);
2647                         if (fsp->is_directory) {
2648                                 /* Can't set allocation size on a directory. */
2649                                 status = NT_STATUS_ACCESS_DENIED;
2650                                 goto fail;
2651                         }
2652                         if (vfs_allocate_file_space(
2653                                     fsp, fsp->initial_allocation_size) == -1) {
2654                                 status = NT_STATUS_DISK_FULL;
2655                                 goto fail;
2656                         }
2657                 } else {
2658                         fsp->initial_allocation_size = smb_roundup(
2659                                 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2660                 }
2661         }
2662
2663         DEBUG(10, ("create_file: info=%d\n", info));
2664
2665         *result = fsp;
2666         if (pinfo != NULL) {
2667                 *pinfo = info;
2668         }
2669         if (psbuf != NULL) {
2670                 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2671                         *psbuf = sbuf;
2672                 }
2673                 else {
2674                         SMB_VFS_FSTAT(fsp, psbuf);
2675                 }
2676         }
2677         return NT_STATUS_OK;
2678
2679  fail:
2680         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
2681
2682         if (fsp != NULL) {
2683                 close_file(fsp, ERROR_CLOSE);
2684                 fsp = NULL;
2685         }
2686         return status;
2687 }
2688
2689 NTSTATUS create_file(connection_struct *conn,
2690                      struct smb_request *req,
2691                      uint16_t root_dir_fid,
2692                      const char *fname,
2693                      uint32_t access_mask,
2694                      uint32_t share_access,
2695                      uint32_t create_disposition,
2696                      uint32_t create_options,
2697                      uint32_t file_attributes,
2698                      uint32_t oplock_request,
2699                      SMB_BIG_UINT allocation_size,
2700                      struct security_descriptor *sd,
2701                      struct ea_list *ea_list,
2702
2703                      files_struct **result,
2704                      int *pinfo,
2705                      SMB_STRUCT_STAT *psbuf)
2706 {
2707         struct case_semantics_state *case_state = NULL;
2708         SMB_STRUCT_STAT sbuf;
2709         int info = FILE_WAS_OPENED;
2710         files_struct *fsp = NULL;
2711         NTSTATUS status;
2712
2713         DEBUG(10,("create_file: access_mask = 0x%x "
2714                   "file_attributes = 0x%x, share_access = 0x%x, "
2715                   "create_disposition = 0x%x create_options = 0x%x "
2716                   "oplock_request = 0x%x "
2717                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2718                   "fname = %s\n",
2719                   (unsigned int)access_mask,
2720                   (unsigned int)file_attributes,
2721                   (unsigned int)share_access,
2722                   (unsigned int)create_disposition,
2723                   (unsigned int)create_options,
2724                   (unsigned int)oplock_request,
2725                   (unsigned int)root_dir_fid,
2726                   ea_list, sd, fname));
2727
2728         /*
2729          * Get the file name.
2730          */
2731
2732         if (root_dir_fid != 0) {
2733                 /*
2734                  * This filename is relative to a directory fid.
2735                  */
2736                 char *parent_fname = NULL;
2737                 files_struct *dir_fsp = file_fsp(root_dir_fid);
2738
2739                 if (dir_fsp == NULL) {
2740                         status = NT_STATUS_INVALID_HANDLE;
2741                         goto fail;
2742                 }
2743
2744                 if (!dir_fsp->is_directory) {
2745
2746                         /*
2747                          * Check to see if this is a mac fork of some kind.
2748                          */
2749
2750                         if (is_ntfs_stream_name(fname)) {
2751                                 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2752                                 goto fail;
2753                         }
2754
2755                         /*
2756                           we need to handle the case when we get a
2757                           relative open relative to a file and the
2758                           pathname is blank - this is a reopen!
2759                           (hint from demyn plantenberg)
2760                         */
2761
2762                         status = NT_STATUS_INVALID_HANDLE;
2763                         goto fail;
2764                 }
2765
2766                 if (ISDOT(dir_fsp->fsp_name)) {
2767                         /*
2768                          * We're at the toplevel dir, the final file name
2769                          * must not contain ./, as this is filtered out
2770                          * normally by srvstr_get_path and unix_convert
2771                          * explicitly rejects paths containing ./.
2772                          */
2773                         parent_fname = talloc_strdup(talloc_tos(), "");
2774                         if (parent_fname == NULL) {
2775                                 status = NT_STATUS_NO_MEMORY;
2776                                 goto fail;
2777                         }
2778                 } else {
2779                         size_t dir_name_len = strlen(dir_fsp->fsp_name);
2780
2781                         /*
2782                          * Copy in the base directory name.
2783                          */
2784
2785                         parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2786                                                     dir_name_len+2);
2787                         if (parent_fname == NULL) {
2788                                 status = NT_STATUS_NO_MEMORY;
2789                                 goto fail;
2790                         }
2791                         memcpy(parent_fname, dir_fsp->fsp_name,
2792                                dir_name_len+1);
2793
2794                         /*
2795                          * Ensure it ends in a '/'.
2796                          * We used TALLOC_SIZE +2 to add space for the '/'.
2797                          */
2798
2799                         if(dir_name_len
2800                            && (parent_fname[dir_name_len-1] != '\\')
2801                            && (parent_fname[dir_name_len-1] != '/')) {
2802                                 parent_fname[dir_name_len] = '/';
2803                                 parent_fname[dir_name_len+1] = '\0';
2804                         }
2805                 }
2806
2807                 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2808                                         fname);
2809                 if (fname == NULL) {
2810                         status = NT_STATUS_NO_MEMORY;
2811                         goto fail;
2812                 }
2813         } else {
2814                 /*
2815                  * Check to see if this is a mac fork of some kind.
2816                  */
2817
2818                 if (is_ntfs_stream_name(fname)) {
2819                         enum FAKE_FILE_TYPE fake_file_type;
2820
2821                         fake_file_type = is_fake_file(fname);
2822
2823                         if (fake_file_type == FAKE_FILE_TYPE_NONE) {
2824                                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
2825                         }
2826
2827                         /*
2828                          * Here we go! support for changing the disk quotas
2829                          * --metze
2830                          *
2831                          * We need to fake up to open this MAGIC QUOTA file
2832                          * and return a valid FID.
2833                          *
2834                          * w2k close this file directly after openening xp
2835                          * also tries a QUERY_FILE_INFO on the file and then
2836                          * close it
2837                          */
2838                         status = open_fake_file(conn, fake_file_type, fname,
2839                                                 access_mask, &fsp);
2840                         if (!NT_STATUS_IS_OK(status)) {
2841                                 goto fail;
2842                         }
2843
2844                         SET_STAT_INVALID(sbuf);
2845
2846                         goto done;
2847                 }
2848         }
2849
2850         if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
2851                 char *resolved_fname;
2852
2853                 status = resolve_dfspath(talloc_tos(), conn, true, fname,
2854                                          &resolved_fname);
2855
2856                 if (!NT_STATUS_IS_OK(status)) {
2857                         /*
2858                          * For PATH_NOT_COVERED we had
2859                          * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
2860                          *                 ERRSRV, ERRbadpath);
2861                          * Need to fix in callers
2862                          */
2863                         goto fail;
2864                 }
2865                 fname = resolved_fname;
2866         }
2867
2868         /*
2869          * Check if POSIX semantics are wanted.
2870          */
2871
2872         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2873                 case_state = set_posix_case_semantics(talloc_tos(), conn);
2874                 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
2875         }
2876
2877         {
2878                 char *converted_fname;
2879
2880                 SET_STAT_INVALID(sbuf);
2881
2882                 status = unix_convert(talloc_tos(), conn, fname, False,
2883                                       &converted_fname, NULL, &sbuf);
2884                 if (!NT_STATUS_IS_OK(status)) {
2885                         goto fail;
2886                 }
2887                 fname = converted_fname;
2888         }
2889
2890         /* All file access must go through check_name() */
2891
2892         status = check_name(conn, fname);
2893         if (!NT_STATUS_IS_OK(status)) {
2894                 goto fail;
2895         }
2896
2897         status = create_file_unixpath(
2898                 conn, req, fname, access_mask, share_access,
2899                 create_disposition, create_options, file_attributes,
2900                 oplock_request, allocation_size, sd, ea_list,
2901                 &fsp, &info, &sbuf);
2902
2903         if (!NT_STATUS_IS_OK(status)) {
2904                 goto fail;
2905         }
2906
2907  done:
2908         DEBUG(10, ("create_file: info=%d\n", info));
2909
2910         *result = fsp;
2911         if (pinfo != NULL) {
2912                 *pinfo = info;
2913         }
2914         if (psbuf != NULL) {
2915                 *psbuf = sbuf;
2916         }
2917         return NT_STATUS_OK;
2918
2919  fail:
2920         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
2921
2922         if (fsp != NULL) {
2923                 close_file(fsp, ERROR_CLOSE);
2924                 fsp = NULL;
2925         }
2926         return status;
2927 }